1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * channel program interfaces 4 * 5 * Copyright IBM Corp. 2017 6 * 7 * Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> 8 * Xiao Feng Ren <renxiaof@linux.vnet.ibm.com> 9 */ 10 11 #ifndef _VFIO_CCW_CP_H_ 12 #define _VFIO_CCW_CP_H_ 13 14 #include <asm/cio.h> 15 #include <asm/scsw.h> 16 17 #include "orb.h" 18 19 /** 20 * struct channel_program - manage information for channel program 21 * @ccwchain_list: list head of ccwchains 22 * @orb: orb for the currently processed ssch request 23 * @mdev: the mediated device to perform page pinning/unpinning 24 * @initialized: whether this instance is actually initialized 25 * 26 * @ccwchain_list is the head of a ccwchain list, that contents the 27 * translated result of the guest channel program that pointed out by 28 * the iova parameter when calling cp_init. 29 */ 30 struct channel_program { 31 struct list_head ccwchain_list; 32 union orb orb; 33 struct device *mdev; 34 bool initialized; 35 }; 36 37 extern int cp_init(struct channel_program *cp, struct device *mdev, 38 union orb *orb); 39 extern void cp_free(struct channel_program *cp); 40 extern int cp_prefetch(struct channel_program *cp); 41 extern union orb *cp_get_orb(struct channel_program *cp, u32 intparm, u8 lpm); 42 extern void cp_update_scsw(struct channel_program *cp, union scsw *scsw); 43 extern bool cp_iova_pinned(struct channel_program *cp, u64 iova); 44 45 #endif 46